Figure 4 Surgical intervention and provisional stabilization. (A, B) Lateral intraoral views: These views demonstrate the delivery of the interim single crowns for the maxillary anterior segment (teeth 13–23) following a minimally invasive preparation. Red rectangles highlight the resulting posterior disocclusion, which is a key mechanical objective of the Dahl principle to establish the necessary restorative space. In panel (A), black arrows indicate the specific sites of the gingivectomy performed on teeth 11 and 12 to correct the preoperative asymmetry and harmonize the gingival zeniths. (C) Frontal intraoral view at 1-month follow-up: This plane of view illustrates the healthy soft tissue healing and stable gingival architecture around the provisional crowns. Black arrows identify the stable, healed gingival margins of teeth 11 and 12, confirming the successful correction of the zenith positions.